Block.



no 844,123. PATENTBD FEB. 12, 190 7. A. GRAINGER & E. KLEPSGH.

BLOCK, APPLICATION FILED APR. 17, 1906.

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Specification of Letters Patent.

BLOCK;

Patented Feb. 12, 1907.

Application filed April 1'7, 1906. Serial No. 312,277.

To Lb whom it may concern:

Be it known that we, AROI-IIBALD GRAINGER and ERNST KLEPSOI-I, citizens of the United States, residing at Saginaw, WV. S., in the county of Saginaw and State of Michigan, have invented new and useful Improvements in Blocks, of which the following is a specification.

This invention relates to blocks or holders for printing purposes, the object of the invention being to provide a block or holder especially designed with reference to clamping stereotype or electrotype plates of different sizes and shapes in place, whereby the clamping of such plates is greatly facilitated and the clamping devices which hold the plate in place are rendered easily adjustable to any desired angle, the clamping devices being easily and rapidly operated for clamping and releasing the stereotype or electrotype plate, thus saving valuable time.

T/Vith the above general object in view the invention consists in the novel construction, combination, and arrangement of parts, hereinafter more fully described, illustrated, and claimed.

In the accompanying drawings, Figure 1 is a top plan view of a block embodying the present invention. Fig. 2 is a bottom plan view of the same. Fig. 3 is a cross-section through one end of the block. Fig. 4 is a crosssection extending transversely through one side or end of the block. Fig. 5 is a detail plan view of one of the clamping-shoes.

The body 1 of the block or holder may be of any desired size as to width and length, and under the preferred embodiment of this invention the body of the block or holder is recessed on its under side, as shown at 2, for the sake of lightness, the recessing of the under side of the block being carried out, preferably, in such manner as to leave inwardly-extending bearing portions 3, which receive the retaining devices by which the jaw or block carriers hereinafter appear. face the block or In its upper or opposite holder is provided with a number of circular bearing-recesses 4, in each creased bearing and binding surface and of which is mounted a swiveled or rotatable jaw or block carrier 5 in the form of a disk, the same being provided in its periphery with an annular groove or seat 6, as shown in Figs. 3 and 4. Mounted on each of the carriers 5 near the periphery thereof, is a clamping-jaw or block 7, having a shank 8, which is journaled in a corresponding opening in the carrier,

are held in place, as will which shank terminates in a head 9,-countersunk in the carrier, as shown in Fig. 4, so as to hold the jaw or block 7 in place. By the arrangement described it will be seen that each of the blocks or jaws 7 has a swiveljointed connection with its respective carrier, whereby said jaw or block may dispose itself at the proper inclination to bear firmly throughout its entire length against the lateral edge of the stereotype or electrotype plate shown at 10.

The clamping mechanism for holding each of the carriers 5 from rotation is shown as comprising a segmental clamping-shoe 11, which fits in the annular groove or seat 6, having a notch 12, which receives a tongue 13 at one end of a slide 14, which works in a groove 15 of a corresponding shape in the face of the block or holder. The opposite or outer end of each slide is provided with a beveled or inclined shoulder 16, which is acted upon by the conical shoulder or portion 17 of a clamp-actuating device 18, shown in the form of a beveled-headed screw, the threaded shank 19 of which is received in the correspondingly-threaded opening or socket in the block, as clearly shown in Fig. 3. By turning the screw 18 with an ordinary screwdriver in the usual manner the screw is raised or lowered, and when tightened said screw cooperates with the inclined shoulder of the slide 14 and forces the slide toward the carrier 5 and acts to press the shoe 11 into binding engagement with said carrier, thus preventing the carrier from turning and holding the clamping jaw or block 7 thereof fiimly against the electrotype or stereotype p ate.

Upon loosening the screw 18 the pressure of the slide 14 against the carrier is relieved, thus permitting said carrier to be turned for releasing the plate.

Instead of employing a shoe 11 in connection with each slide the slide may be shouldered, as at 20, to bear directly against the adjacent carrier, the principle involved being exactly the same The shoes 11 are ordi narily preferred, however, as they give an inmore securely protect the carriers against turning.

By loosening the clamp-actuating devices 18 the carriers 5 are free to be turned in either direction, and by thus turning or adjusting the carriers the clamping-jaws or blocks 7, swiveled thereon, may be moved to- Ward and away from each other and brought to the desired relative positions to receive and hold the plate 10 between them. It will be observed that theplate 10 may be clamped either centrally of the block or toward one side or end thereof, or said plate may be clamped at various angles. Also plates of various sizes may be clamped upon the block bythe means described, thus enabling a single block to be used for printing-plates of for the screw 21.

We claim 1. A block or holder for printing-plates comprising a plurality of swiveled carriers, clamping jaws or blocks held by said carriers, and. slides movable toward and away from the edges of the carriers for clamping the same.

2. A blockor holder for printing-plates comprising a plurality of swiveled jaw-carriers, clamping jaws mounted thereon, a

clamping-slide engaging each carrier, and a cllamp-actuating device cooperating with said s ide.

3. A block or holder for printing-plates comprising a plurality of swiveled jaw-carriers, clampingjaws mounted thereon, a slide for holding each carrier, and a clampactuating device for operating the slide, said clamp-actuating device and slide having inclined cooperating shoulders.

4. A block or holder for printing-plates comprising a plurality of swiveled jaw-carriers, jaws carried thereby, slides engaging the carriers, and clamp-actuating devices in the form of screws having a threaded engagement with the body of the block or holder and provided with inclined shoulders which cooperate with corresponding shoulders on the slides.

5.- A block or holder for printing-plates comprising a plurality of swiveledjaw-carriers, jaws carried thereby, slides for'holding the carriers, clamping shoes interposed between the slides and carriers, and clamp-actuating devices co operating with said slides to shift the same.

In testimony whereof we affix our signa ture in presence of two witnesses.

AROI-IIBALD GRAINGER. ERNST KLEPSCH. Witnesses:

SAMUEL JENNINGS, H. H. SHALER. 

